National

An Oregon farmer discovered the genetically engineered wheat growing in his field about a month ago. Nobody knows how it got there, how widely it has spread, or whether it has been in fields harvested for food. GMO wheat is not approved for sale in the U.S.

Intensely smoggy days are striking less often thanks to better technology that pinpoints problems, and laws that have prompted fixes. Still, scientists say they haven't yet tracked down all the sources of the pollution fouling the region's air.

Lesions on the teeth of crack and methamphetamine addicts have a lot in common with those on the teeth of people addicted to soda, a dental researcher writes in a case study. But even people who wouldn't consider themselves "soda addicts" are at risk of dental erosion, he says.

Two sources familiar with the search for a new director of the agency tell NPR that James B. Comey is in line to succeed outgoing chief Robert Mueller. Comey was the No. 2 official at the Justice Department in the George W. Bush administration.

George Porter was a member of the Tuskegee Airmen, the first black fighter pilots, and those who supported them, in American history. A mechanic during the war, Porter found ways with his colleagues to keep their planes airborne even as they were denied the tools needed to do their jobs.

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